AT my premium this summer I was doing a 34+ mile RT commute 5 days a week and riding up to 150 more miles on the weekend. All of my rides were training rides (for training's sake) but the longer weekend rides I typically rode more casually...shorter I would pound it harder. I built up to that, and worked really hard on my diet and sleep, but I suffered fewer issues than I do now if I try and ride even a casual 50 miles.